Finding the Fourth Proportional to 72,347.15, 99,696.89 and 55,370.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72,347.15 : 99,696.89 = 55,370.57 : x
2. Step 2: Convert to fraction form
   72,347.15/99,696.89 = 55,370.57/x
3. Step 3: Cross multiply
   72,347.15x = 99,696.89 × 55,370.57
4. Step 4: Simplify right side
   72,347.15x = 5,520,272,851.19
5. Step 5: Solve for x
   x = 5,520,272,851.19/72,347.15
6. Step 6: Final answer
   x = 76,302.57